aiqbench analysis
This research demonstrates how spin-squeezed states can enhance phase sensitivity in atom interferometers by several decibels over the standard quantum limit, even when accounting for realistic losses and scattering. The study provides a generalized formalism to optimize Bragg beam splitter parameters while highlighting practical constraints such as finite temperature effects on entanglement benefits. These findings offer critical pathways for advancing precision metrology using quantum-enhanced atom interferometry under non-ideal conditions.
Squeezing Enhancement in Lossy Multi-Path Atom Interferometers
arXiv:2409.04091v3 Announce Type: replace Abstract: This paper explores the sensitivity gains afforded by spin-squeezed states in atom interferometry, in particular using Bragg diffraction. We introduce a generalised input-output formalism that accurately describes realistic, non-unitary interferometers, including losses due to velocity selectivity and scattering into undesired momentum states. This formalism is applied to evaluate the performance of one-axis twisted spin-squeezed states in improving phase sensitivity. Our results show that by carefully optimising the parameters of the Bragg beam splitters and controlling the degree of squeezing, it is possible to improve the sensitivity of the interferometer by several dB with respect to the standard quantum limit despite realistic levels of losses in light pulse operations. However, the analysis also highlights the challenges associated with achieving these improvements in practice, most notably the impact of finite temperature on the benefits of entanglement. The results suggest ways of optimising interferometric setups to exploit quantum entanglement under realistic conditions, thereby contributing to advances in precision metrology with atom interferometers.
Abstract:This paper explores the sensitivity gains afforded by spin-squeezed states in atom interferometry, in particular using Bragg diffraction. We introduce a generalised input-output formalism that accurately describes realistic, non-unitary interferometers, including losses due to velocity selectivity and scattering into undesired momentum states. This formalism is applied to evaluate the performance of one-axis twisted spin-squeezed states in improving phase sensitivity. Our results show that by carefully optimising the parameters of the Bragg beam splitters and controlling the degree of squeezing, it is possible to improve the sensitivity of the interferometer by several dB with respect to the standard quantum limit despite realistic levels of losses in light pulse operations. However, the analysis also highlights the challenges associated with achieving these improvements in practice, most notably the impact of finite temperature on the benefits of entanglement. The results suggest ways of optimising interferometric setups to exploit quantum entanglement under realistic conditions, thereby contributing to advances in precision metrology with atom interferometers.
Quantum Physics (quant-ph); Atomic Physics (physics.atom-ph)
arXiv:2409.04091 [quant-ph]
(or arXiv:2409.04091v3 [quant-ph] for this version)
https://doi.org/10.22331/q-2026-06-01-2122 DOI(s) linking to related resources
Full text under the publisher's open licence · 179 words
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